#include <stdio.h>
int main()
{
    int a = 1, b = 1;
    int a_post, pre_b;
    a_post = a++;
    pre_b = ++b;
    printf("a     a_post b     pre_b\n");
    printf("%1d %5d %6d %5d\n", a, a_post, b, pre_b);
    return 0;
}